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PDF Si88441 Data sheet ( Hoja de datos )
| Número de pieza | Si88441 | |
| Descripción | QUAD DIGITAL ISOLATORS | |
| Fabricantes | Silicon Laboratories | |
| Logotipo |  |
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Si88x4x
QUAD DIGITAL ISOLATORS WITH DC-DC CONVERTER
Features
High-speed isolators with
Highly-reliable: 100 year lifetime
integrated dc-dc converter
High electro-magnetic immunity
Fully-integrated secondary sensing and ultra-low emissions
feedback-controlled converter with RoHS compliant packages
dithering for low EMI
SOIC-20 wide body
dc-dc converter efficiency of 78% Isolation of up to 5000 Vrms
Up to 2 W isolated power with High transient immunity of
integrated power switches
100 kV/µs (typical)
Options include dc-dc shutdown, AEC-Q100 qualified
frequency control, and soft start Wide temp range
Conversion
–40 to +125 °C
3/5 V to isolated 3/5 V
24 V to isolated 3/5 V supported
Precise timing on digital isolators
0–100 Mbps
18 ns typical prop delay
Applications
Industrial automation systems Data acquisition
Hybrid electric and electric vehicles Motor control
Isolated power supplies
PLCs, distributed control systems
Inverters
Safety Approval (Pending)
UL 1577 recognized
VDE certification conformity
Up to 5000 Vrms for 1 minute
IEC 60747-5-2 (VDE 0884-10)
CSA component notice 5A
EN 60950-1 (reinforced insulation)
approval
CQC certification approval
IEC 60950-1, 61010-1, 60601-1 GB4943.1
(reinforced insulation)
Description
The Si88xx integrates Silicon Labs’ proven digital isolator technology with an
on-chip isolated dc-dc converter that provides regulated output voltages of
3.3 or 5.0 V (or >5 V with external components) at peak output power levels
of up-to 2 W. These devices provide up-to four digital channels. The dc-dc
converter has user-adjustable frequency for minimizing emissions, a soft-start
function for safety, a shut-down option and loop compensation. The device
requires only minimal passive components and a miniature transformer.
The ultra-low-power digital isolation channels offer substantial data-rate,
propagation delay, size and reliability advantages over legacy isolation
technologies. Data rates up to 100 Mbps are supported, and all devices
achieve propagation delays of only 23 ns. Ordering options include a choice
of dc-dc converter features, isolation channel configurations and a fail-safe
mode. All products are certified by UL, CSA, VDE, and CQC.
Ordering Information:
See page 36.
Pin Assignments
See page 31
GNDP 1
VSW 2
VDDP 3
VDDA 4
GNDA 5
SH 6
A1 5
A2 6
A3 7
A4 8
HF
XMTR
HF
RCVR
HF
XMTR
HF
RCVR
HF
XMTR
HF
RCVR
HF
XMTR
HF
RCVR
Si88240
Patents pending
16 GNDB
15 VDDB
14 VREG
13 NC
12 VSNS
11 COMP
12 B1
11 B2
10 B3
9 B4
Rev. 0.5 4/15
Copyright © 2015 by Silicon Laboratories
Si88x4x
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
1 page  
Si88x4x
Table 2. Electrical Characteristics1 (Continued)
VDDA = VDDP = 3.0 V – 5.5 V, TA = –40 to 125 °C, unless otherwise noted
Parameter
Symbol
Test Condition
Min Typ Max Unit
Load Regulation
VOUT(load)/V
OUT
See Figure 2
ILOAD = 50 to 400 mA
0.1 %
Output Voltage Ripple
See Figure 2
COUT = 0.1 µF in parallel with
10 µF, ILOAD = 100 mA
100
mV p-p
Turn-on overshoot
VOUT(start)
See Figure 2
2%
CIN = COUT = 0.1 μF in
parallel with 10 μF,
ILOAD = 0 A
CSS = 220 nF, for
Si883xx/Si886xx
Continuous Output Current
5.0 V to 5.0 V
3.3 V to 3.3 V
3.3 V to 5.0 V
5.0 V to 3.3 V
ILOAD(max)
See Figure 2
mA
400
400
250
550
Cycle-by-cycle average
current limit
No Load Supply Current
IDDP
Si882xx, Si883xx
No Load Supply Current
IDDA
Si882xx, Si883xx
No Load Supply Current
IDDP
Si884xx, Si886xx
No Load Supply Current
IDDA
Si884xx, Si886xx
ILIM
IDDPQ_DCDC3
IDDAQ_DCDC4
IDDPQ_DCDC4
IDDAQ_DCDC4
See Figure 2
Output short circuited
See Figure 2
VDDP = VDDA = 5 V
See Figure 2
VDDP = VDDA = 5 V
See Figure 2
VIN = 24 V
See Figure 2
VIN = 24 V
3A
30 mA
5.7 mA
0.8 mA
5.8 mA
Peak Efficiency
See Figure 2
78 %
Notes:
1. Over recommended operating conditions as noted in Table 1.
2. VOUT = VSNS(V) x (1 + R5/R6) + R5 x Ioffset
3. VDDP current needed for dc-dc circuits.
4. VDDA current needed for dc-dc circuits.
5. The nominal output impedance of an isolator driver channel is approximately 50 , ±40%, which is a combination of the
value of the on-chip series termination resistor and channel resistance of the output driver FET. When driving loads
where transmission line effects will be a factor, output pins should be appropriately terminated with controlled
impedance PCB traces.
6. tPSK(P-P) is the magnitude of the difference in propagation delay times measured between different units operating at
the same supply voltages, load, and ambient temperature.
7. Start-up time is the time period from the application of power to valid data at the output.
Rev. 0.5
5
5 Page 
Si88x4x
Table 2. Electrical Characteristics1 (Continued)
VDDA = VDDP = 3.0 V – 5.5 V, TA = –40 to 125 °C, unless otherwise noted
Parameter
Symbol
Test Condition
Propagation Delay
tPHL See Figure 1
VDDx = 3.3 V
Propagation Delay
tPLH See Figure 1
VDDx = 3.3 V
Propagation Delay
tPHL See Figure 1
VDDx = 5.0 V
Propagation Delay
tPLH See Figure 1
VDDx = 5.0 V
Pulse Width Distortion
|tPLH – tPHL|
Pulse Width Distortion
|tPLH – tPHL|
Propagation Delay Skew6
Channel-Channel Skew
Output Rise Time
PWD
PWD
tPSK(P-P)
tPSK
tr
See Figure 1
VDDx = 3.3 V
See Figure 1
VDDx = 5.0 V
CL = 15 pF
Min Typ Max Unit
17.8 ns
14.5 ns
17.5 ns
12.6 ns
3.4 ns
4.8 ns
2.0
— 1.0
2.5
ns
ns
ns
Output Fall Time
tf CL = 15 pF
2.5 ns
Common Mode
Transient Immunity
Startup Time7
CMTI
tSU
VI = VDD or 0 V
VCM = 1500 V
40 100
55
kV/µs
µs
Notes:
1. Over recommended operating conditions as noted in Table 1.
2. VOUT = VSNS(V) x (1 + R5/R6) + R5 x Ioffset
3. VDDP current needed for dc-dc circuits.
4. VDDA current needed for dc-dc circuits.
5. The nominal output impedance of an isolator driver channel is approximately 50 , ±40%, which is a combination of the
value of the on-chip series termination resistor and channel resistance of the output driver FET. When driving loads
where transmission line effects will be a factor, output pins should be appropriately terminated with controlled
impedance PCB traces.
6. tPSK(P-P) is the magnitude of the difference in propagation delay times measured between different units operating at
the same supply voltages, load, and ambient temperature.
7. Start-up time is the time period from the application of power to valid data at the output.
Rev. 0.5
11
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| PDF Descargar | [ Datasheet Si88441.PDF ] | |
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